Making side frames



Jan. 19, 1926.

L. c. PRITNER ET AL 'IAKING SIDE FRAIES v Filed August 15, 1922 2Sheets-Sheet 1 1 1 %ao.cwwfwor Patented Jan. 19, 1926.

I UNITED STATES PATENT" OFFICE.

LINDSAY G. PRITNER AND HENRY C. DORRIS, F J'OHNSTOWN, PENNSYLVANIA.

MAKING SIDE FRAMES.

Application filed August 15, 1922. Serial No. 581,929.

To all whom it may concern;

Be it known that we, LINDSAY O. PRITNER States, and residing in the cityof Johnstown, county of Cambria, and State of Pennsylvania, haveinvented certain new and useful Improvements in MakingSide Frames; andwe do hereby declare the following to be full, clear, and exactdescription of the invention, such as willenable others skilled in theart to which it appertains to make and use the same.

Our invention relates to making side frames with particular reference toside frames for railway trucks formed of pressed steel, and has for itsobjectto materially simplify the fabrication of such side frames fromsingle sheets of steel, with certaln ans cillary reinforcements andadditions, involving the cutting of a blank of a shape or contourgenerally corresponding to the two lateral faces of the side frame,withappropriate openings to define the top and bottom arch bars, toreceive the bolsters and column guides, to provide integral pedestal tiebars, and for other specific purposeshereinafter described, die flangingcertain of the marginal edges of the blank and of the openings therein,bending the blank transversely of its longitudinal axis to bring the twohalves thereof into parallelism, with the marginal flanges in abuttingrelation, welding the abutting flanges together, and finally weldingtheadditions and reinforcing elements in place. i g V The invention15 illustrated in the accompanying draw ngs, 'lIl wh1ch Figure 1 is aplan View of a rectangular plate from which the blank for a pressedmetal truck side frame is formed; Figure 2 is a plan View of the cutblankfrom which the pressed metal shape for the truck side frame ismade; Figure 3is a central vertical longitudinal sect onal elevationthrough the blank after it has been flangedyFlgure a1 is a verticalsectional elevation through the bending dies, the partially formedpressed metal truck side frame being shown in end elevation therein atthe end of the bending operation; Figure 5 is an end elevation of thepressed metal truck side frame after the blankhasbeen bent into itsfinal; form, but before. the flanges have been welded together; Figure 6is a side elevation of the iinishd truck side framei after it has beenframe without lessening its strength; 9 are welded;Figure 7 is an endelevation of the finished truck side frame shown in Figure and HENRY C.Donnrs, citizens of the United 6; Figure 8 is a vertical transversesectional elevation through the finished truck side frame, the sectionbeing taken on the line VIIIVIII of Figure 6; Figure 9 is a bottom planView of the finished truck side frame; F1gure'10 is a side elevationshowing theend portions of the top and bottom flangmg dies and a portionof the blank with the end of the pedestal tie bar bent down in, theposition it assumes before v the flanging operation, and Figure 11 is atop plan view of the end portion of the bottom flanging die justafterthe fianging operation. I

Referring now to thecharacters of reference on the drawings :-1indicates the plain rectangular plate from which the blank is to bevcut; 2 indicates generally the plate after 1t has been cut to form theblank; 3 are triangular shaped holes with rounded corners between thebolster openings and the ends; 4 are the bolster openings in the tomarch bar and the end portions of the top arch bar; 6 are holes in thecentral portion of the top arch bar through which the interior journalbox boltsare inserted; 7 are holes for welding the reinforcements nearthe ends of the top arch bar; 8 are the 1 cutout portions of the ends ofthe top arch bar whichallow the ready insertion of the outer journal boxbolts and also lighten the the outer fiat ends of the tie bars of theout out blank; 10 are ears or added extensions to the tie bars to servein holding the parts inposition while theirinner ends are flanged andouter ends bent as heretofore despribed; 11 are semi-circular holes inthe ends of the tie bars and'inthe ends of the top archba-r, member,which, when the parts are bent in their final position, formsubstantially circular holes for the journal box bolts; 12 areprojecting portions of theiflanges which are adapted to" be weldedtogether after the frame is pressed into its final shape; 13 arerecesses or indentations between the projections 12-whicl1 form portionswhich are not to be welded; 14 are the bottom flanged edges of the blankand 15 are the bent ends of the pedestal tie bars after the blankhasbeen flanged, The internal flanges of the triangular shaped holes 3 are16,and the internal flanges of the top arch bar member over the bolsteropenings are 17, and the upper part of the top arch bar member is 18.The complete finished truck side frame is generally indicated as 19 andthe finished pedestal tie bar extension portions thereof are 20. Thebottom pads 21 of these bars are welded in position, and these pads havecentral holes therein which register with corresponding holes in thepedestal tie bars to receive the lower ends of the journal box bolts.The bolsterguide pads are 22 and these are welded to the truck framecolumns by their edges to maintain them in the locations shown. Areinforcing member 23 of channel section with trapezoidal flanges isneatly fitted within each end of the top arch bar member and weldedthereto at the places indicated as 24, including the holes in the sidesof the top arch bar member as illustrated. 25 are the welds of theflanges which are thus joined. The holes through which the journal boxbolts pass are 26. The former previously referred to for use in shapingthe top arch bar member is 27 and this is preferably composed of twowedgeshaped pieces. which, on account of their shape, may be readilywithdrawn as desired. As illustrated particularly in Figures 10 and 11,28 is a part of the bottom fianging die having an inclined end portion29 and an inclined inner side 30. while 31 is a portion of the topHanging die co-operating therewith. 32 is a part of the stripper plateused in connection with the top and bottom flanging dies to assist informing and holding the pedestal tie bar and in the ejection thereoffrom the bottom die after the flanging has been completed. The topbending die is 36. which is secured in the groove 34 of the holder 33 bymeans of the bolts while 37 is the bottom bending die provided with thebending groove 38 therein.

The operation of making a side frame is as follows: -A blank rectangularplate 1 is placed upon a pair of cutting dies and at either one or twooperations is cut to the form illustrated in Figure 2. After this thecut wblank is preferably heated and placed on a pair of fianging diesand flanged to the form shown in Figure It is then preferably, at thesame heat. placed; over abottom bending die 37 in the position shown bydotted lines in Figure 4, and then by the action of the groove 38 in thebottom bending die and the downward movement of the bending die 36.which has the removable former 27 secured to the bottom edge thereof. isbent to the shape illustrated by full lines in Figure 4. The former 27is then withdrawn, or if desired, may be left in temporarily, and thepartially bent shape is then placed between a pair of pressing dies andtwo halves are closed together to the shape shown in Figure 5. Afterthis is done the adjacent contiguous edges of the projections of theflanges are welded together either electrically or otherwise. Rcinforoing plates 23 are forcibly pressed into posi tion and welded in thelocations shown by the dotted lines in Figure 6. The pedestal tie barpads 21 are also welded in the positions indicated in Figures (3 and S),the weld ing of these being accomplished around their edges. Asparticularly illustrated in Figures 10 and 11, the integral projectingportions 10 of the tie bar are so sha )cd and located as to contact withthe flanglng dies and hold this part in such a way that the flanging ofthe inner portion of the tie bar is accomplished. and the shape of thedies is also. such that the out or portions 20 of the pedestal tie barsis bent at right angles to the body portion of the frame and substairtially parallel to and spaced the proper distance from the extendingends of the bottom portion of the top arch bar so as to receive thejournal boxes (not shown) thcrcbctwccn.

Although we have shown and described our invcntion in considerabledetail. we do not wish to be limited to the exact and spc' cilic detailsthereof. as shown and described. but may use such modifications. insubstitutions for. or equivalent thereof as are cmbraccd within thescope of our invention. or as pointed out in the claims.

Having thus described our invention. what we claim and desire to secureby Letters Patent is:

1. The steps in the method of forming a pressed metal side frame. whichconsists in taking a plain plate. simultaneously cutting the marginsthereof and the openings therein. then dic forn'iing flanges around themargins of certain portions of said plate and certain of the openingstherein. then hcnding said plate about its intermediate portion in sucha. way as to place the flanges of the two halves substantially oppositeeach other. and welding the halves together at the flanges.

2. The steps in the method of forming a pressed metal truck side frame,which coir sists in taking a plain plate. simultaneously cutting themargins thereof and the holes therein of one-half thereof at oneoperation. then turning the plate around and similarly cutting the otherhalf. then forming flanges around certain of the plate margins andcertain of the openings. then bending the plate about its intermediateportion until the flanges are adjacent, welding the adjacent edges ofthe flanges together: said flanges having previously been cut withindentations and projecting portions, which when the plate is bent areat certain and predetermined distances apart.

3. The steps in the method of forming a pressed metal truck side frame.which consists in taking a plain plate, simultaneously plate about itsintermediate portion until the flanges are adjacent, said flanges havinpreviously been cut with indentations and projecting portions, whichwhen the plate is bent are at certain and predetermined distances apart,and then welding together the contiguous projecting parts.

4. The steps in forming a pressed metal truck side frame, which consistsin cutting a plate to the outlines desired, including the variousopenings therein and providing extra extending portions of the pedestaltie bar members thereof, then flanging the plate in a pair of flangingdies adapted to flange certain of the plate margins and the materialaround the various openings, said flanging dies being provided withportions adapted to contact with the extending portions aforesaid toflange the inner portions of the pedestal tie bars while turning ,theouter flat ends thereof at about right angles to the body of the truckframe, bending the plate about its intermediate portion until theflanges are adjacent, and welding the adjacent edges of the flangestogether.

5. The steps in making a pressed metal truck side frame of integralform, consisting in cutting a plain plate to the shape desired withportions which are ultimately to form certain flanges provided withprojections, then flanging various portions there of including thoseprovided with the projections aforesaid, then bending the plate aboutits intermediate portion and placing the projecting portions of eachhalf of the plate opposite each other, and then welding said projectionstogether.

6. The steps in the method of forming a pressed metal truck side frame,which consists in cutting a plain plate to the shape desired, then dieforming certain of the margins thereof and of the openings therein, thendie bending the plate about its intermediate portion with the aid of aformer adapted to contact with said intermediate portion and assist inshaping the top arch bar portion thereof, then withdrawing said formerand closing the two halves until the flanges are opposite and at certainpredetermined distances apart, and welding the ad jacent edges of theflanges together.

7. The steps in the method of forming a metal truck side frame, whichconsists in cutting a plate around its margins and to form variousopenings therein, certain of the margins being provided with projectingportions symmetrically arranged, then die flanging certain of themargins of said plate and the openings thereof, then bending the plateabout its intermediate portion and pressing the two halves toward eachother in such a way that the projecting portions are opposite eachother, and spaced apart, and then welding together said projections.

8. The steps in the method of forming a 'truck side frame, whichconsists in cutting a plain plate around the margins thereof and to formbolster openings, side openings and end openings therein, whileproviding projections on certain of the edges thereof and semi-circularopenings in other portions, all syn'imetrically arranged, then dieflanging certain of the margins, then bending the plate about itsintermediate portion and pressing the two halves together, whereby theprojections are opposite each other and spaced apart and. thesemi-circular openings are opposite each other and adapted to formsubstantially circular holes in the finished frame, and then welding theprojections together. i

9. The method of forming a pressed metal frame, which consists incutting a plain plate around the margins thereof and with variousopenings therein and simultaneously providing projectingportions onvarious margins symmetrically arranged, then die flanging certain of themargins, then bending the plate about its intermediate portions with theaid of a former adapted to assist in shaping the interior of the toparch bar member, then withdrawing said former and pressing the twohalves toward each other, then welding the contiguous edges of saidprojections, then introducing flanged reinforcing members in the ends ofthe arch bar portion and welding same in place, and welding pads on thecolumn portions to se cure the same together, and to form bolsterguides.

In witness whereof we hereunto aflix our signatures.

LINDSAY C. PRITNER. HENRY C. DORE-IS.

